Load-carrying additives based on organo-phosphites and amine phosphates
OwnerLiehpao O. Farng, William F. Olszewskiinventors
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Abstract
Lubricant and fuel compositions containing a small additive concentration of a novel organo-phosphorus composition based on phosphite-derived hydroxyl compounds and amine phosphates possess excellent antiwear properties coupled with good extreme pressure activities. Additional antioxidation, cleanliness, antifatigue, high temperature stabilizing, and friction modifying properties are expected. Both the phosphite-hydroxy moiety and the amine phosphate moiety are believed to provide the basis for the synergistic antiwear and EP property of these novel additives.
Claims25
An improved lubricant composition comprising a major proportion of an oil of lubricating viscosity or grease prepared therefrom and a minor amount of a multifunctional antiwear, antioxidant, anticorrosion additive product of reaction prepared by (a) reacting a dihydrocarbyl phosphite with an aldehyde or ketone to form a dihydrocarbyl phosphonate-derived alcohol;
- (b) thereafter reacting said dihydrocarbyl phosphonate-derived alcohol with phosphorus pentoxide thereby forming dihydrocarbyl phosphoric acids;
- and (c) subsequently neutralizing the dihydrocarbyl phosphoric acids with an amine thereby obtaining a dihydrocarbyl amine phosphate wherein the reaction is carried out at temperatures varying from ambient to about 350.degree. C. under pressures from ambient up to about 1,000 psi or autogenous pressures for a time sufficient to obtain the desired dihydrocarbyl amine phosphate additive product of reaction and wherein the reaction is carried out in molar ratios of reactants varying from equimolar to more than molar to less than molar.
A process of preparing a multifunctional antioxidant, antiwear additive product prepared by (a) reacting a dihydrocarbyl phosphite with an aldehyde or ketone to form a dihydrocarbyl phosphonate-derived alcohol;
- (b) thereafter reacting said dihydrocarbyl phosphonate-derived alcohol with phosphorus pentoxide thereby forming dihydrocarbyl phosphoric acids;
- and (c) subsequently neutralizing the dihydrocarbyl phosphoric acids with an amine thereby obtaining a dihydrocarbyl amine phosphate wherein the reaction is carried out at temperatures varying from ambient to about 350.degree. C. under pressures varying from ambient to about 1,000 psi or autogenous pressures for a time sufficient to obtain the desired additive product of reaction and wherein the reaction is carried out either in the presence of or in the absence of a catalytic amount of a catalyst and is carried out in molar ratios of reactants varying from equimolar to more than molar to less than molar.
A multifunctional antiwear/antioxidant lubricant additive product of reaction prepared by (a) reacting a dihydrocarbyl phosphite with an aldehyde or ketone to form a dihydrocarbyl phosphonate-derived alcohol;
- (b) thereafter reacting said dihydrocarbyl phosphonate-derived alcohol with phosphorus pentoxide thereby forming dihydrocarbyl phosphoric acids;
- and (c) subsequently neutralizing the dihydrocarbyl phosphoric acids with an amine thereby obtaining a dihydrocarbyl amine phosphate wherein the reaction is carried out at temperatures varying from ambient to about 350.degree. C. under pressure varying from ambient to about 1,000 psi or autogenous pressures for a time sufficient to obtain the desired additive product of reaction and wherein the reaction is carried out in molar ratios of reactants varying from equimolar to more than molar to less than molar.
A multifunctional antiwear, antioxidant, anticorrosion lubricant additive product of reaction having the following generalized structure:
- ##STR9## where x is 1 to 2, and x+y=3, Z is any natural number O.ltoreq.Z.ltoreq.100;
- R.sub.3 and R.sub.4 are hydrogen or C.sub.1 to C.sub.60 hydrocarbyl which optionally contain at least one heteroatom selected from a member of the group consisting of nitrogen, sulfur, or oxygen;
- and wherein R.sub.1 is C.sub.1 to about C.sub.60 hydrocarbyl;
- R.sub.2 is hydrogen or C.sub.1 to about C.sub.30 hydrocarbyl, x is 1 to 2, and x+y=3.
Dependencies are inferred from the claim text.